1117. Выполните действия: a) 5 + 20; 8 6) 10 -7; ж) 3+5: 11 3) 97-7- 12 12 M) 4-2: H) 4- 5 4 в) 4 + 10; и) 40+2; о)8- 12' г) 120-12; κ) 80+7;Ⅱ) 5-30; +712 13' д) 4+3; л) 50-1; p) 4-30. e) 7-40;

Ответы: a) 7\(\frac{3}{8}\); б) 3\(\frac{3}{4}\); в) 14\(\frac{1}{6}\); г) \(\frac{8}{15}\); д) 8; е) 3\(\frac{2}{7}\); ж) 9\(\frac{10}{11}\); з) \(\frac{1}{12}\); и) 7\(\frac{1}{5}\); к) 16\(\frac{21}{13}\); л) 4\(\frac{2}{5}\); м) 1\(\frac{8}{11}\); н) 3\(\frac{4}{9}\); о) 7\(\frac{5}{12}\); п) 1\(\frac{5}{8}\); p) \(\frac{4}{9}\)

• а) 5 + 2\(\frac{3}{8}\) = 7\(\frac{3}{8}\)
• б) 10\(\frac{3}{4}\) - 7 = 3\(\frac{3}{4}\)
• в) 4\(\frac{1}{6}\) + 10 = 14\(\frac{1}{6}\)
• г) 12\(\frac{8}{15}\) - 12 = \(\frac{8}{15}\)
• д) 4\(\frac{1}{9}\) + 3\(\frac{8}{9}\) = 7 + \(\frac{1+8}{9}\) = 7 + \(\frac{9}{9}\) = 7 + 1 = 8
• е) 7\(\frac{5}{7}\) - 4\(\frac{3}{7}\) = 3\(\frac{2}{7}\)
• ж) 3\(\frac{8}{11}\) + 5\(\frac{2}{11}\) = 8 + \(\frac{8+2}{11}\) = 8 + \(\frac{10}{11}\) = 8\(\frac{10}{11}\)
• з) 9\(\frac{7}{12}\) - 7\(\frac{6}{12}\) = 2 + \(\frac{7-6}{12}\) = 2 + \(\frac{1}{12}\) = 2\(\frac{1}{12}\)
• и) 4\(\frac{1}{5}\) + 2\(\frac{4}{5}\) = 6 + \(\frac{1+4}{5}\) = 6 + \(\frac{5}{5}\) = 6 + 1 = 7
• к) 8\(\frac{9}{13}\) + 7\(\frac{12}{13}\) = 15 + \(\frac{9+12}{13}\) = 15 + \(\frac{21}{13}\) = 15 + 1\(\frac{8}{13}\) = 16\(\frac{8}{13}\)
• л) 5\(\frac{3}{5}\) - 1\(\frac{1}{5}\) = 4\(\frac{2}{5}\)
• м) 4\(\frac{5}{11}\) - 2\(\frac{8}{11}\) = 1\(\frac{8}{11}\)
• н) 4 - \(\frac{5}{9}\) = 3\(\frac{4}{9}\)
• о) 8 - \(\frac{7}{12}\) = 7\(\frac{5}{12}\)
• п) 5 - 3\(\frac{3}{8}\) = 1\(\frac{5}{8}\)
• р) 4 - 3\(\frac{5}{9}\) = \(\frac{4}{9}\)

Ответы: a) 7\(\frac{3}{8}\); б) 3\(\frac{3}{4}\); в) 14\(\frac{1}{6}\); г) \(\frac{8}{15}\); д) 8; е) 3\(\frac{2}{7}\); ж) 9\(\frac{10}{11}\); з) \(\frac{1}{12}\); и) 7\(\frac{1}{5}\); к) 16\(\frac{21}{13}\); л) 4\(\frac{2}{5}\); м) 1\(\frac{8}{11}\); н) 3\(\frac{4}{9}\); о) 7\(\frac{5}{12}\); п) 1\(\frac{5}{8}\); p) \(\frac{4}{9}\)